Some other tag names that work here are:
i -- for italicize
b -- for bold
u -- for underline
url -- for a URL
quote -- for a quotation (does not preserve indentation)
php -- like code, but also throws in syntax highlighting.

Find a post that uses code tags and click on its "quote" button. Within that quote you will see a number of tags being used, including the code tags. Quit out of the reply by back-arrowing.